Made a 3/8 wide car how do I Keep it on the Track

[kcbigfan]

I made 2 car that are both 3/8 inch thick. What are some things I can do to keep them on the track?

I made 2 cars that have pretty much the same design.

The first car has 2 holes that are 1 and 1/2 inches in diameter this car weighs 1.34 ounces with the Body, Axles, Wheels. I have 3/4 of an inch space between the nose of the car and the first cut.

The second car has 3 holes with same diameter cut that weighs with Body, Axles, Wheels 1 ounce. The nose of the car has 1/4 inch space before the first cut.

Should I use 3 point wheel contact or 4?
I am using a standard wheel base that is pushed back a little


Any Ideas???

[cycrunner]

What concerns you about keeping the car on the track? Are you building a Stock car with BSA wheels? You have removed a lot of wood from the front of the car so you could possibly weight your car with its resulting center of mass (COM) too far aft and tend to be unstable - get a wheely! You should try to get the COM about 3/4" in front of the rear axel, and keep the added weights as low as possible.
Why did you only allow only 1/4" of wood in front of the first hole in the second car? You want sufficient wood there to trigger the finish line sensor. Don't know if that will be a problem but I haven't seen a car like you describe yet.
You should go with 3 wheels touching the track if your rules allow it, and use the rail riding technique for the fastest times. If you are not familiar with this there are threads on this forum describing it. When do expect to race your cars? Can you post pictures of them? Good Luck!